Packing for pump-pistons



(No Modem B. HOLLAND, Jr.

- Y PACKING' FQRYPUMP PIsToNs, am.

y mmm 1Ilfilm4255195; 17139.1. 4 Inventor:

'l l jltzorney.

UNITED STATES PATENT' .OFFICE `BENJAMIN HOLLAND, Jn., OF NEWPOEE'EHODE'ISLAND, ASSIGNOR'TO THOMAS S. N'OwELL, TRUSTEE, OF BOSTON, MASSACHUSETTS.

l PACKING FOR PUMP-PISTONS, 86C.

SPECIFICATION forming part of Letters Patent No. 255,729, dated March-`28, 1882;

Application filedNovember 11, 1881.

To all whom it may concern Be it known that I, BENJAMIN HOLLAND, Jr., of Newport, in the county of Newport and State of Rhode Island, have invented anew and useful Improvement in Packing-Rings for Pump-Pistons and other Joints, ot' which the following, taken in connection with the accompanying drawings, is a speciication.

My invention relates to the construction of packing-rings for rendering pump-pistons and other joints ofhydraulic apparatus absolutely.

water-tight 5 anditconsistsin the combination, with a flexible cupped packing of leather or other` suitable material of a metal ring placed within said cup and provided with annular chambers upon the two faces thereof, which are contiguous to the inner surfaces ofsaid cup, and orifices leading from one ofthe opposite faces of said metal ring to one or both ot' said annular chambers, as will be hereinafter described.

Figure l of the drawings is a central longitudinal section through a portion of a pumpcylinder and its piston with my invention applied thereto. Fig. 2 is a similar section of a portion ol' a T-pipe with two branch pipes arranged to be partially rotated about the axis of that portion ofthe T to which they are attached, and having my invention applied thereto. Fig. 3 is an `elevation of the cupped leather packing, and Fig. 4 is aseetion of same. Figs. 5 and 6 are respectively an elevation and a section of the metal ring, and Figs. 7 and 8 are similar views of a modified form of the metal ring.

In Fig. l ofthe drawings, `A is a portion of a pump-cylinder. Bis the main body ot' the l piston, arranged to be reeiprocated by means ofthe piston-rod Gand other mechanisn. (Not shown.) The flexible cupped packing-ring a is placed with its outer radial face against the lower radial face of the piston B, and the metal ring bis placed within said cupped ring, as shown, and the whole is secured together by the rod G and the disk D, which is tirmly clamped to the piston B by the nut E, said disk D being so formed as to project outward beyond thev inner periphery ot `the metal ring b, and thus hold it in place. The ring b has formed in its periphery an annular groove, b', andin its upper radial face a similar groove,

(No model.)

b2, which grooves b and b2, when the ring b is placed in position in the cupped ring a, form annular chambers between the metal and flexible rings, to which water is admitted through the orifices o and o' as the piston is moved downward to force the water below it through the discharge-passage. (Not shown.) 'lhe pressure of the water admitted to the chambersA b2 and b forces the cupped packing hard against the lower face of the piston B .and the inner periphery ofthe cylinder A, so as to effectually prevent any leakage past the piston.

The construction of the rings aand b will be more readily understood by reference to Figs. 3, 4, 5, and 6.

In Fig. 2, F is a T-section ofpipe, to the opposite ends of the cross-arm or horizontal portion of which are iitted, so that they may be partially rotated thereon, the branch pipes Ff and F2, secured in position by the bolt Gr and nut G'. A cupped packing-ring, a, with a metal ring, b, within it, is placed between the inner radial face of each of the branch pipes F and F2 and theinwardly-projecting liange d of' the T-pipe F, with the radial portion of the cupped packing between the metal ring b and the brauch pipe F" or F2, as shown. When water under pressure, as in the case of fire-engine hose, is made to pass through the T-pipe F and the branch pipes F' and F2, as indicated bythe arrows,A water will pass through the orifices c and o' and ll the chambers b" and b2, and by its pressure force the leather cupped ring a hard 'against the contiguous face of the branch pipe F or F2 and the inner periphery of theerOss-arni of the T-section, and thus render thc j oints between theT-sectionand the branch pipes F and F2 absolutely water-tight without regard to the rotation of the branch pipes about the axis of the bolt G.

In some cases I cut the metal ring b through upon one side, as Shown in Fig. 7 at e, so that the pressure of the water upon its inner periphery will cause said metal ring to be forced outward against the cupped packing-ring a by expanding said metal ring.

When a cutring is used on a piston or pumpplunger I make oritces f in the clamping-disk D, to permit the passage of the water to the annular chamber g Within the ring b, as shown in Fig. 1. The orifices c may be drilled from I the grooves b to the innerperipheral surface of the ring b, as'show'n infFig. 8, or from the groove b2 to the opposite radial face of said ring, as shown in Fig. G.

The cupped packing-rings@ lnavbe made of leather, rubber, or any other flexible material that is susceptible of being swaged or molded into a cupped form; but I prefer leather as the material best adapted for general use, all things considered.

What I claim as new, and desire to secure by LettersPatent of the United States, is-

1. As arneans of packing joints Water-tight, the combination of a. cupped ring of leather or other flexible material, and a metal ring placed Within said cup and provided with the annular grooves b and b2 and the orifices c and c, substantial] y as and for the purposes described. 2. As ameans of packing joints to render them water-tight, the combination of the cupped packing-ring a and the metal ring b, provided with the annular grooves b and b2 and the oriflc'es c and c', and divided upon one side, substantially as and for the purposes described.

Y Executed at Boston,` Massachusetts, lthis 27th day ot' October, A. D. 1881. Y

BENJAMIN HOLLAND, JR.

Witnesses:

N. C. LOMBARD, W. E. LOMBARD. 

